File handle and guide.



No. 686,|06. Patented Nov. 5, 190i. T. W. MiLLER.

FILE HANDLE AND GUIDE.

(Application filed May 31, 1901.)

(No Model.)

YN: Nonms PETERS cou Fuero-L1m0wAsn|noTon. x3. c.

NITED STATES PATENT OFFICE.

TIMOTHY W. MILLER, OF PHOENIX, ARIZONA TERRITORY.

FILE HANDLE AND GUIDE.

SPECIFICATION forming part of Letters Patent N o. 686,106, datedNovember 5, 1 901.

Application filed May 3l, 1901.

To @ZZ wir/0m t may concer/z.-

Be it known that I, TIMOTHY W. MILLER, a citizen of the United States,and a resident of Phoenix, in the county of Maricopa and Territory ofArizona, have invented a new and Improved File-Handle and File-Guide, ofwhich the following is a full, clear, and exact description.

This invention has for its object to provide a tile-handle with a novelattachment which guides the reciprocating movement of an attached lileused to sharpen the teeth of saws, whereby any desired degree of bevelmay be given to the cutting edges of the saw-teeth, and a suitable rakeor forward pitch may be also given the teeth.

The invention consists in the novel construction and combination ofparts, as is here-A inafter described, and defined in the appendedclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a plan view of the improvement supporting a iile shownengaged with the teeth of a saw. Fig. 2 is a partly sectional side viewof the file handle and guide applied for filing the teeth of a saw shownin part. Fig. 3 is a reverse plan view of the improved saw-filingdevice, and Fig. 4 is a transverse sectional view su bstantiall y on-theline 4 t in Fig. l. d

The file-handle or gripspiece, that carries a triangular ile A for itsmanipulation, consists in part of an elongated block 5, fashionedperipherally to adapt it for convenient manipulation, and in thegrip-piece 5 a bore a is longitudinally formed throughout the length ofthe same. In the bore a is fitted to turn the cylindrical plug G, whichmay be of any preferred length, and said plug is held in place by theset-screw l), that is inserted through a tapped perforation in thegrip-piece 5. l

In the plug 6 an angular socket cis formed, that extends axially thereinfrom its outer end for the reception of the tang A, that is an integralextension from the triangular' tile A, and upon the end of thehandle-body or grip-piece 5,thatis adjacent to the outer end of thesocket c, radial graduations d are marked,

Serial No. 62,516. (No model.)

toward which a single mark e, formed on the end of the plug, extends. Asshown in Fig. 4, the file-body and its angular tang A will have the sidethereof nearest to the mark e disposed horizontally when the mark epoints to the central graduation of the circular row d, so that anangular corner e of the iile will be in the same vertical plano with thecentral graduation when the file is to sharpen teeth which do not have aforward rake, as will be hereinafter more fully described.

Upon the lower side of the grip-piece 5 a complementary handle portion 5is secured with screws f or by other means, and a bore d' extendslongitudinally therethrough, preferably parallel with the bore a. An arm7, that may with advantage be in the form of a cylindrical rod, isfitted in the bore a and extends partially within it. The body of thearm 7 is grooved longitudinally from a point near the extremity thereof,which is intro duced within the bore a', and in said groove 't a detentspring-finger 8 is held by one end, the free end of which is formed witha rounded toe 8, being positioned near the extremity of the groove whichis within the bore a', as shown in Figs. 2 and 3.

Two longitudinal slots g g' are oppositely formed in the wall of thehandle-section 5a and may be successively alined with the fin-v -will benecessary in operating the implement.

In the bore ct a coiled spring 9 is introduced, which has its forwardend in Contact with the inserted end of the arm 7, and a closing-piece10, which is inserted and secured in the bore a at the end thereof thatis opposite from the one occupied by the arm 7 presses upon theremaining end of the spring, so as to hold the toe 8 of thespring-finger 8 in Contact with the forward end of the slot g 'and thearm 7 projected a normal degree from the bore et'. Upon the outer end ofthe arm `7 a gage-bar ll is pivoted between its ends, preferably in aslot h, formed in the end of the arm in a horizontal plane and at rightangles to the plane of the groove t.

Upon the gage-bar 1l, opposite the pivotscrew m, that holds the bar uponthe arm 7 and also affords means to clamp said bar at IOO a desiredpoint of angulardeviation from a plane at right angles to the axis ofthe cylindrical arm 7, a plurality of graduations n are formed radially,which graduations coact with a mark n on the end of the gage-bar Il todefine the exact degree of angular deviation had by the straight frontedge of the gage-bar from a right angle to the longitudinal axis of thecylindrical body of the arm 7.

In use, assuming that the saw Bis clamped and supported with its teeth cdisposed in a horizontal plane, so as to be freely operated upon withthe triangular file A, the operator grasps the handle of the novelimplement and disposes the file A with its angular lower edge in one ofthe V-shaped spaces between two adjacent teeth so, and in order toretain the bevel given to the cutting edges of the teeth to be operatedupon, if this bevel is correct, the file is now laterally inclined soasto take an angular position with regard to the side of the saw-bladenearest to the operator, which will adapt the le to engage the teeth atthe correct angle of deviation from a right angle to the side of thesaw-blade. Before placing the file in the space between two teeth fr ofthe saw B the pivot-screw m should be relaxed, so that the gage-bar 11may be laterally rocked thereon, and when the file is properly disposedbetween two of the teeth an, as explained, a sufficient forward movementof the Iile A between the saw-teeth will cause the gage-bar to pressagainst the sawblade, and this will rock said gage-bar into contacttherewith throughout the length of the bar, as shown clearly in Fig. l.The gage-bar 11 is now firmly secured in place on the slidable arm 7 byproper adjustment of the pivot-screw m, and as said bar is pressedagainst the saw-blade by a forward movement of the file A said file willcut the edges of two adjacent teeth with which the file has contactexactly on the bevel defined by the angular position of the gage-bar onthe arm 7, the latter being adapted to traverse the bore a in thehandle-section 5a against stress of the spring 9, that will press thearm 7 outwardly and keep the gage-bar-11in assured contact with thesaw-blade when the file A is drawn rearwardly during the operation offiling.

It will be obvious that the operation which has been described is to berepeated for each pair of adjacent teeth in the saw until said teethhave been sharpened on adjacent edges thereof from one side of thesaw-blade, and to givethe remaining edges of said teeth a correct bevelsimilar to that formed on them from one side of the saw the saw-blade ischanged in posit-ion in its clamped support, so as to bring thepreviously far side of the blade opposite to the operator. The propergraduation on the gage-bar being noted the pivot-screw m may now beslackened and the gage-bar rocked thereon to give it an opposite lateralinclination, which may be rendered exactly the same in degree as thatpreviously given thereto by disposing the gagebar so as to bring acorresponding graduation n directly opposite the fixed mark fn on theend of the arm 7. The pivot-screw m is now tightened to hold thegage-bar from changing its adjustmentaccidentally, and the operator by arepetition of the operation already described for one edge of each ofthe saw-teeth m may sharpen correctly the remaining cutting edges of thesame. As the spring-finger 8 is adapted to traverse the straight slot g,it will by its attachment at the forward end thereof upon the slidablearm 7 serve to prevent said arm from rocking sidewise, and this willkeep the gage-bar 11 always level While the device is being used. Itwill also be seen that, if preferred, the gagebar 11 can be left Vasfirst adjusted and the slidable arm 7 be turned half a revolution, so asto introduce the toe 8a within the upper slot g', which willcorrespondingly turn the gage-bar 1l endwise and change its inclination,as indicated by dotted lines in Fig. 3, this change of position of thegage-bar adapting said bar to define the angular tread of the tile whenit is used to complete the ling operation, as hereinbefore mentioned.

In case it is desired to give the saw-teethl more or less forwardinclination this may be readily effected and the exact degree of forwardinclination of the teeth of the saw denoted by an adjustment of thefile-supporting plug 6 to bring the mark e thereon directly in alinementwith a proper graduation d on the end of the handle-section 5 and thensecuring the plug by a clamping adjustment of the set-screw h, that hadbeen slackened to permit a rocking movement to be given to the plug, asthis rockable adjustment of the plug 6 will correspondingly incline thecutting sides of the tile A to cut the backs of the teeth and theirleading edges at a desired inclination.

Minor changes from the forms herein shown and described maybe madewithin the scope of my inven tion-as, for example, I may make the twoparts or sections 5 5a of the handle in one piece, and I may form thearm 7 angular in the body, and thus dispense with the necessity of usingthe finger 8. Hence I do not wish to restrict my invention to the exactconstruction shown and described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. A ile handle and guide, comprising a handlehaving two parallel bores therein, a rockable and securable plug in onebore having an angular socket therein, an indicating device that definesthe degree of rocking adjustment given to the plug, a spring-pressed armslidable in the other bore of the handle, means to guide said arm andhold it from rocking movement, a gage-bar held to swing in a horizontalplane on the outer end of the spring-pressed arm, and means to securethe gage-bar from swinging.

rol

2. A file handle and guide, comprising a handle having two parallelbores therein one above the other, a plug held to rock in the upper boreand having an axial angular socket extended therein from the front end,a setscrew in the handle bearing upon the plug, a scale on the end ofthe handle around the upper bore adapted to define the rocking movementof the plug, a spring-pressed arm slidable in the lower here of thehandle, a spring detent-linger on the arm having a bent toe that mayengage either of two opposite longitudinal slots in the Wall of thelower Witnesses:

E. J. BENNETT, H. GOODMAN. l

